Outlet-box support



Y Aug. .16, 1927.

' 1,639,496 H. GlNsBuRG OUTLET Box SUPPORT i Filed Feb. 20. 1926 l l a f 4 a z 4 ATTORNEY Patented Aug. 16, V1927'.

NlrenfgsTArI-:s

HENRY GINSBURG; or EWQYQRK, Nqr., Asme-.Noa 'ro Ronce-armaron Maneras- 'rUnINGH coMrnNY, yor CHICAGO, immers,

n conronnrron or rumors.

. "creer-roi .SUPERT- "implication lined February This invention rela-testo :improvements V electricalapparatus and'has `referen'ce particularly vto outlet boxes and supports :therey for commonly used in yconnection with 'elecv tric lightinstallations inbuildings.

lt is desirablein cle ...rical installationsof this character to be able to .adjust ,the .outlet boxes after their supports are in position and further having made the outlet box fast to the support to insure against rotary movement of the box when the hickey of the lighting iixture is adjusted. r

ith'the foregoing in mind it is the purpose of my invention to provide an outlet l5 box of the character described which may be supported and adjusted on a bar forming the foundationof the box and which when locked to the bar may not be rotated.Y I ac-` complish this purpose by means of a simple7 i@ cheapk and eilicient device for expediting the j installation of. outlet boxes.

The invention isy illustratively exempliiied in the accompanying drawings, in which, Figure 1 is a top plan View of my imfl-f proved outlet box and means for connecting same to the supporting bar; Figure 2 is a longitudinal sectional. view taken through the same; and Figure 3 ris a perspective View of the connecting member. Figuret is a fifi transverse sectional view of a modification of the connecting member. f v

VReferring to the drawings, 10 denotes a iiat bar hanger of steel or iron which is adapted tobe attached 'to' the joists, beams or Si the like used in building construction and which is provided with perforations 114 to receive the means used to attach the bar to the joists,y etc. The outlet box 12 in the present case comprises a cup shaped cast 4 member havinga top wall 13 and marginal depending skirt portions 141.` .Opposite portions of the skirtlli are straight and form one of the sides ,of cable chambers 15 which are arranged in pairs at opposite sides of the i5 center of the box. As illustrated clearly in Figure 1 the inner walls of each pair of chambers 15 form an inverted V-shaped corner 16 which is directly opposed tol a similar corner of the otherpair. The chambers 15 project to a depth corresponding withthe length of the skirt 14 and as a'consequence the center portion ofthe boxl Vis also depressed forming a` central chamber 17. The walls'of the central chamber 17 preferably converge slightly towards the bottom,

2o, 2192s. "semi no; 89,507.

v so asv :to bring lthe corners 16'into closer `proximity "with each other at the bottom :across the chamber. Projecting beyond the `:plane ,of the 'skirt 111- and integral with the walls off .theicentral chamber 17 isa threaded 1i projection 18 "having an axial borey 1S), .coun-terlsunk at its vnaderend to accommodate the head of machine screw 20,the stem 2l of the screw being arranged in the bore 19.

To lock the outlet box l2 on the bar 10, f vthe present invention comprehends a U- shaped strap member 22 having its upright Y arms 23`pr`ovided with slots 24 to accommodate the bar 10 therethrough and lbelow the I slots 24 thesides of the arms taper inwardly 7 to meet the bridge portion 25, which is provided at its opposite ends beyond the narrow portionf of the arms 23 withk V- Y' shaped projections or teeth 26, the latter being adapted to seat in the corners 16 of if? the center chamber 15 of the outlet box. kA threaded opening 27 is Vprovided in the mid portion of the bridge 25 to accommodate the machine screw 20, which when tightened, tends to draw the member 22 into the cene" Vtral chamber 15 and since thebox 22 rests against the bar 10, adjustment to tighten'the screw 20 causes the bar and box to be drawn together. Because of the teeth26 engaging the corners 16, the box during installa- .85 tion is prevented from turning relative to the bar 10 even-before the screw 20 is tightened, thereby enabling the electrician to adjust the box on the barwithout losing its position. VAfter the outlet box is tightenedeu to the bar 10 andthe electrical connection made, the usual hickey vmay be adjusted over the threaded projection 18 without fear of the'box turning with'the hickey.

struction hereinV described lies in the factv that when the fixture is` to be removed from the box, the removal Vmay be effected without the box itself turning or becomingsubstantiall loosened from its support. v Turnin i 'to modify the form of the connecting member which,v instead .of being U-shapedVV as Yshown in Figure 3 maygbe in the form ofl a closed loop, as shown in Figure 4 with the bottom-wall of double thickness. The ad-V vantage'of this modied construction is that Another important advantage of the con-Y a? a greater threaded area is presented for engagement by the threads of the screw 21.

What I claim and desire to secure by Letters Patent is 1. The combination of a bar hanger of the character described, a carrier strap apertured to receive the bar therethrough and having a projecting portion below the aperture, an outlet box having a hollow screw threaded projection to provide a well to receive the lower portion of the strap, the said lower portion and well being of a shape to prevent relative turning-movement of the outlet box and strap, and means extending through and engaging the hollow screw threaded portion and adjustable in the lower portion of the strap to move the latter to clamp the box against the bar.

2. The combination of a bar hanger of the character described, a U-shaped carrier strap apertured adjacent the free ends t-o receive the bar therethrough and having the closed end of the strap provided with a threaded opening, an outlet box having a hollow screw threaded rojection to provide a well to receive the e osed end of the strap, the latter having opposite projections to lit depressions in the wall of the well to prevent relative turning movement of thebox and bar, and a screw extending through and engafring the hollow screw threaded portion and adjustable in the threaded opening in the strap to move the latter to draw the box against the bar.

In testimony whereof I aiX my signature.

HENRY GINSBURG.

GERTHTQA'E @F GRREGTMN.,

Patent No. L639A96. Granted August i6, 1927, to

HENRY GWSBURG.

It is heby certified @am th@ ahw/e numemd @Mem was emneusly issued to Roach-Appleton Manufacturing Gampmyg @E Ghcag, Ninos za cmparaion of Mlinoisg as assignee, wezea@ said patent shu have bem issued to the inventor said Ginsbug, a@ @wmf @i the enfze imerem; im sad invegtisn; and hat he Leteis Pmem swud be mad wth mi@ @Memisa Hmmm that the same may conrm to ih@ :facfd m" me @ase im 1@ we aen @Misa Signed and seale this Mh day @i Gambe?, A., D i927.

M. 3 Mame,

Seal. ming @ammissoner of Patens.

Patent No, L639A96, @aimed Aagus @6, 1927, to

It is hereby certified @mi the ahw@ numbd pawn was eiaonemusy issued A to Roach-@Meina Manusscumg Gempmy @i Chicagm, mois a em'praon l of Mlm-ois, as assigne@ Whez'ez@ Said paient shmzd have bem issued to the g, as @wmf @i the @mme imexes; im @aid inwtim; and 9mm' wu he read wim this mecmm @heiem that l Seem @i the case im im Paem @'ee.

mamar said Gmsbm s ai y Gummi, A., D, E927.

ha't he said Leiters same may cimffm 5to t Signed and @salmi this im M. 3. Mame, Seal. ming Gmmissionef of Patents. 

